Are some meteoroids rubble piles?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00470253" target="_blank" >RIV/67985815:_____/16:00470253 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1017/S174392131500873X" target="_blank" >http://dx.doi.org/10.1017/S174392131500873X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1017/S174392131500873X" target="_blank" >10.1017/S174392131500873X</a>

Result language
angličtina
Original language name
Are some meteoroids rubble piles?
Original language description
The possibility that some meteoroids in the size range 1 - 20 meters are rubble piles i.e. assembles of boulders of various sizes held together only by small van der Waals forces, is investigated. Such meteoroids are expected to start disrupting into individual pieces during the atmospheric entry at very low dynamic pressures of ~ 25 Pa, even before the onset of ablation. The heterogeneous bodies as Almahata Sitta (asteroid 2008 TC3) and Benešov are primary candidates for rubble piles. Nevertheless, by analyzing the deceleration, wake, and light curve of the Benešov bolide, we found that the meteoroid disruption started only at a height of 70 km under dynamic pressure of 50 kPa. No evidence for a very early fragmentation was found also for the Chelyabinsk event.
Czech name
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Czech description
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Project
<a href="/en/project/GAP209%2F11%2F1382" target="_blank" >GAP209/11/1382: Properties of meteoroids from different classes of parent bodies</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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